Working group report
WG D1.67

Design criteria for experiments to measure the breakdown voltage of insulating gases in uniform electric fields

Round robin breakdown experiments in (quasi)uniform electric fields have been performed in 7 different laboratories for air, HFO1234ze(E)/N2 (20 %/80 %), and SF6 as example gases. The experiments are supported and discussed with an extended literature review of gas-physical phenomena and constructional setup parameters influencing the results. The goals are to investigate a) the influence of certain experimental parameters on the outcome and scatter of breakdown measurements and b) to define suitable and practical setups for breakdown experiments and evaluation methods for the main experiments of Cigré working group D1.67 investigating new non-SF6 insulating gases and gas mixtures. The final recommendation is to use polished plane-plane Rogowski electrodes with a spacing of 5 mm in a self-supporting PEEK frame, and an AC voltage rate of rise around 0.1 kV/s. The value of this study goes beyond the work of the working group D1.67 and serves as basic recommendation for all groups performing breakdown experiments in gaseous insulation systems.

To read this article subscribe to ELECTRA. Single edition, annual options and CIGRE membership are available. Access to all editions is free for CIGRE members.

Already have an account? Sign in

Subscribe now


Materials and emerging test techniques

The scope of Study Committee D1 covers new and existing materials for electrotechnology, diagnostic techniques and related knowledge rules, as well as emerging test techniques with expected impact on power systems in the medium to long term.

Learn more
Top of page